Polytechnic University of Turin

About: Polytechnic University of Turin is a education organization based out in Turin, Piemonte, Italy. It is known for research contribution in the topics: Finite element method & Computer science. The organization has 11553 authors who have published 41395 publications receiving 789320 citations. The organization is also known as: POLITO & Politecnico di Torino.

Serial concatenation of block and convolutional codes

Abstract: Parallel concatenated coding schemes employing convolutional codes as constituent codes linked by an interleaver have been proposed in the literature as ‘turbo codes’. They yield very good performance in connection with simple suboptimum decoding algorithms. The authors propose an alternative scheme consisting in the serial concatenation of block or convolutional codes and evaluate its average performance in terms of bit error probability.

A comparison of homogeneity tests for regional frequency analysis

Abstract: [1] The assessment of regional homogeneity is a critical point in regional frequency analysis. To this end, many homogeneity tests have been proposed, even though a general comparison among them is still lacking. Commonly used homogeneity tests, based on L moments ratios, are considered here in a comparison with two rank tests that do not rely on particular assumptions regarding the parent distribution. The performance of these tests is assessed in a series of Monte Carlo simulation experiments. In particular, the power and type I error of each test are determined for different scale and shape parameters of the regional parent distributions. The tests are also evaluated by varying the number of sites belonging to the region, the series length, the type of the parent distributions and the degree of heterogeneity. We find that L moments based tests are more powerful when the samples are slightly skewed, while the rank tests have better performances in case of high skewness. On the basis of these findings we propose a simple method to guide the choice of the homogeneity test to be used for the different possible cases.

Logistic service measurement: a reference framework

Abstract: Many companies measure their logistic performances using several methods. As a consequence, various sets of indicators can be found in practice and in the literature. In particular, the same event can be measured in different ways, so that the relative performance is sometimes totally different. The purpose of this paper is to suggest a hierarchy in logistic performance measurements. A referring model for evaluating the logistic performances is also proposed in this paper, together with the definition of a reference framework for the selection of supply chain performance measurements.

Suppression of ψ(2S) production in p-Pb collisions at √sNN=5.02 TeV

Abstract: The ALICE Collaboration has studied the inclusive production of the charmonium state ψ(2S) in proton-lead (p-Pb) collisions at the nucleon-nucleon centre of mass energy (formula presented.) = 5.02 TeV at the CERN LHC. The measurement was performed at forward (2.03 < ycms< 3.53) and backward (−4.46 < ycms< −2.96) centre of mass rapidities, studying the decays into muon pairs. In this paper, we present the inclusive production cross sections σψ(2S), both integrated and as a function of the transverse momentum pT, for the two ycms domains. The results are compared to those obtained for the 1S vector state (J/ψ), by showing the ratios between the production cross sections, as well as the double ratios [σψ(2S)/σJ/ψ ]pPb/[σψ(2S)/σJ/ψ]pp between p-Pb and proton-proton collisions. Finally, the nuclear modification factor for inclusive ψ(2S) is evaluated and compared to the measurement of the same quantity for J/ψ and to theoretical models including parton shadowing and coherent energy loss mechanisms. The results show a significantly larger suppression of the ψ(2S) compared to that measured for J/ψ and to models. These observations represent a clear indication for sizeable final state effects on ψ(2S) production.[Figure not available: see fulltext.